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Real Estate and Intangible Assets - Pro-Forma Condensed Consolidated Statements of Operations as Properties Acquired (Detail) (USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Operating Data: |  |
Total operating revenue | $ 2,682,835 us-gaap_BusinessAcquisitionsProFormaRevenue | $ 1,753,180 us-gaap_BusinessAcquisitionsProFormaRevenue
Total operating expenses | (1,522,103)land_BusinessAcquisitionsProFormaOperatingExpenses | (1,419,129)land_BusinessAcquisitionsProFormaOperatingExpenses
Other expenses | (956,235)land_BusinessAcquisitionsProFormaOtherExpense | (523,968)land_BusinessAcquisitionsProFormaOtherExpense
Net income before income taxes | 204,497 land_BusinessAcquisitionsProFormaNetIncomeLossBeforeIncomeTax | (189,917)land_BusinessAcquisitionsProFormaNetIncomeLossBeforeIncomeTax
Provision for income taxes |  | (6,623)land_BusinessAcquisitionsProFormaIncomeTaxExpenseBenefit
Net income | $ 204,497 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss | $ (196,540)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Share and Per-share Data: |  |
Earnings per share of common stock - basic and diluted | $ 0.03 land_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted | $ (0.03)land_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted
Weighted average common shares outstanding - basic and diluted | 7,753,717 land_BusinessAcquisitionProFormaWeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted | 6,530,264 land_BusinessAcquisitionProFormaWeightedAverageNumberOfCommonSharesOutstandingBasicAndDiluted

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